Title :
Quantum Dot Passively Mode-Locked Laser Optimization for High-Power and Short Pulses
Author :
Xu, Tianhong ; Bardella, Paolo ; Montrosset, Ivo
Author_Institution :
Dipt. di Elettron. e Telecomun., Politec. di Torino, Turin, Italy
Abstract :
The performance optimization of monolithic two-section passively mode-locked quantum-dot lasers is investigated using the finite-difference traveling-wave model changing simultaneously the length of the saturable absorber and the cavity reflectivity. We demonstrate that, by properly choosing these two parameters, a reduction in the pulse width from 4.4 ps to 930 fs and an increase in the product of the peak power and the average power from 0.012 to 0.2 W2 were obtained. In addition, clear trends and design guidelines are extracted from the simulation results and explained.
Keywords :
finite difference methods; high-speed optical techniques; laser cavity resonators; laser mode locking; optical saturable absorption; quantum dot lasers; cavity reflectivity; finite-difference traveling-wave model; high-power pulse; monolithic two-section passively mode-locked lasers; performance optimization; quantum-dot lasers; saturable absorber; short pulse; Absorption; Cavity resonators; Laser mode locking; Mathematical model; Quantum dot lasers; Reflectivity; Mode-locked lasers (MLLs); modeling; quantum dots (QDs); semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2227956
